Grease dispenser



April '7, 1931. E. J. ADAMS 1,799,492

I GREASE DISPENSER Filed Aug. 22, 1928 5 Sheets-Sheet 1 Inventar B QM E.J. ADAMS GREASE DISPENSER April 7, 1931.

Filed Aug. 22, 1928 3. Sheets-Sheet 2 10 the highand low pressure supplyunitandto -matin as shownlin the present embodiment 5.

Patented Apr 7,1931 I t I it IUNITED STATES 'PA'IIEIII" I OFFICE i i unwn mjnnem s, on LITTLE FALi' 'iS ivnw jron z; I i

i V v GREASE DISPENSER" i b V 'Applicationfiled August 22, 1928. sesam301,354. a I The present invention relates to a grease and illustratingthe relative position ofv'the dispensing apparatus and has forian objectfeed pipe extending therefrom. a f r to'provide pressure dispensingmeans adapt R ferring nowto the drawings in detail, ed to selectivelydispensev greasefrom the apthe lnv ntlon comprises a supporting frameparatusunder hi h or low plj'essure'. indicate atifi; pori' e uppe potio of so A furtherobject ofthe invention is to prowhich i arr ng d a g'Se llpp y t 0 :1 vide separate discharge tubes'for the high 1 hOpP .QPfi YFOPGD s upper e d r and low pressure to supply units andto proandWhich may be of any desirable construcvide a common pressuregenerating'means for tion, such aS' f n nce of a rectangular for-'- l providepressure adjusting means for I each" 1 ven p' a ll g' j' l er 7 3r; ofsaid units wherebyto' selectively control ranged therein and of'sufiicient weight to the operation of aeh th r oi v normally forcethevmaterial'w ithin thetank A still further objectof the inventionisjto t W I the l P 1 bf fOiQ iS i which the material maybe. fed eitherinto the f the ank j V I r high pressure'supply unit or through the lowT The] opening 8 leads "into cylinderult), pressure f d tube. I v Iwhlch may be cast integral with the bottom Another object ofthe'inventionaisto pro- P LO t fi i ,fi illustrated in gu e vide agrease dispensing apparatus of this 3, if Preferred may beseparatelyc'onstuct-cs character adapted particularly for use in d.an eu a y t c fh to, n Wi in supplying grease under either high or low w h 1s p re e yr a ged a piston 10, to pressure to motor vehicles and industrial or "thend h is ttac d acio-nnectother machinery, which is of a simple and grod 11 p rated by a Cr nk 1 1 6 m practical construction,'eflicient andreliable trlcally arned On a Wheel 13 rotatably I in performance,admirably adapted to handle m n d 011 a Shaft 14:- The sha-ft 14 alsogrease of Various viscosityrelatively ineX, sp r-gear 15 operatlvelyengagedpensive to manufacture and maintain in op- W a 1 9 5 16 ye on aShaft 17 eration and otherwise well adapted f to the g w h a pu ey Wheel18, which pulley no purpose f hi h the same is intended wheells-operativelyconnected with the belt Other objects and advantagesreside in the .drlve l lld ng to a f u special constructionand-combination of the i 9 e P 5 10 15 P id various elements comprisingthe invention, i a lqngltudmalty .extendmg n ireference being had to theaccompanying shdably Wgedwlthm a'bore 22 't t d drawings forming a parthereof, wherein: i g 5 thtshpplytink together Wlth the 55 Figure 1 is ani elevational View :1 V 4 i s v2 11 be'seen from an insPection offfigff: 2 i 3 i g g f w w ure 3 ofthe drawingsthe discharge opening i Pan n PP 5 own 111 '8 from the supply tank is engaged with the I isprovide a low pressure supply unit from h rging through the opening 8 atthe base e0 40 section'illustrating the. construction of the 1 thmughtheside wall thereof ss f e ;q p yq q fer e im a a termediate th ends.ofthe cylinder thus nto cleaning positlonl nto the pressure unformingthe inner end'of the cylinder into aand I v a I compressionchamber. With the pistonlO Flgure 3 is a vertlcal sectional viewdisposed in its outermostiposition the grease throughthepres'surecreating a supply unit isadaptedto enter the cylinder and uponthe ablepressure valve 34, a similar valve 35 besure supply chamber 23, and thebase of. which is connected a discharge hose 24,

which preferably is of a flexible nature and adapted to extend to theparts of the motor vehicle or other machinery desired to be suppliedwith a quantity of the grease under pressure. 1

A manually operated control'valve is disposed between the feed pipe andthe lower pressure supply chamber 23 adapted to close communication withthe former V the cylinder 9 and between the pipe 26 and,

the bore 22 each of said valves being yieldably retained in closedposition by means of a coil spring 29, the valve-27 being adapted to bemoved into open position during the compression stroke of the piston 10and the valve 28 bein disposed forsimilar movementupon the suctionstroke of the plunger 21. i I

The bore22 has its outer end connected with a high pressure feed pipe30, con: striic'ted similar to the'lower pressure feed pipe 24 and alsohaving a ball check valve 31 interposed between the bore and the pipenormally. retainedv in closedj position by means of a coil spring 32.The discharge ends of each of the pressure feed pipes 24and are providedwith suitable n'ozlzles (not shown) having hand controlled valves of a'type well known in the art for controlling the discharge of grease fromthe respective pipes. a

A return pipe 3 connects the lower 'mrtion of the supply tank 6 withboth the low pressure supply chamber 23 and the high pressure feed pipe30'co1n1nunicati'on' with such return pipe and the low pressure supplychamber 23 being controlled by an adjusting interposed between thereturn pipe 33 and the high pressure discharge pipe 30.

Each of the valves 34 and are normally retained in. closed position by ayieldable coil spring 36 the tension of which may be regu lated throughthe adjustament of the hand wheel 37. i v

In the operation of tlie device it will be apparent that the grease fedinto the cylinder 9 will be forced through the pipe 22" into the lowpressuresupply chamber 23 and out of the 'diseh'arge pipe 24 wheneverthe control valve 25 is arranged in open position. Upon closing thevalve 25 the grease will then pass from the pipe 22 through the highpressure feed pipe 26 into the bore 22 and forced therefrom by theplunger 21 out through the high pressure discharge pipe 30. It will beap parent that through the adjustment of the valve 34 and 35 thequantity of grease discharged from the respective pipes 24 and 30 maybesuitably controlled. Any excess in the amount of grease for the lowpressure supply chamber 23 and thehigh pressure discharge pipe 30 maythus be returned to the supply tank 6 by way of the return pipe33.

A suitable clutchmechanismindicated at 38 in Figure 1 of the drawingsmay be interposed between the gear wheel 15 and the wheel 13 providedwith the crank pin 12, said clutch being operable to a control lever 39whereby to controlthe rotation of the op po'site end of the shaft 14upon which said gear and wheel 15 and 13 respectively are mounted.

Furthermore it will be understood that any desirable number of thegrease dispensing appja'ratuses may be operatively connected with thesingle motor 20, the supply tank 6 of each apparatus being provided withgrease of a different viscosity forus'e with machinery of differenttypes. By providing each apparatus with a clutch mechanism as aboveexplained the operation, of the dispensing apparatus may be selectivelycontrolled.

4 Since the suction stroke of'the piston 10 is utilized to draw thegrease into the cylinder 9, it is important, when using heavy grease, tokeep the body of the grease in the hopper (S closely packed to preventthe formation of air pockets therein which would destroy the force ofthe suction stroke and for this purpose the follower 7 is provided,which comprises a pair of superimposed weighted plates of a slightlylessdiameter than the interior of the hopper and placed on top of the greasetherein, the plates being secured together for relative adjustment byscrews 40. The edges of the plates are beveled toward their ad jacentfaces whereby to form a groove 41 thereabout andv'vithin which isarranged a coil spring 42 extending circumferentially ofthe plates.

To the edge of the upper plate is attached a flexible skirt 43constituting a washer forming a snug lit with the walls of the hopperand yieldably pressed thereagainst by the spring 41 whereby to preventescape of the grease about the edges of the follower. The follower thusserves to keep the grease-packed 'in the hopper for feeding into theylinder 9.

it is obvious that the invention is susc'ep'ti 'ble of various changesand modifications, without departing from'the spirit or scope of theinvention or sacrificing any of its advantages, and accordingly "claimall such forms of the device to which I am entitled.

Having thus described my invention, what I claim as new is: a

1. A. grease dispensing apparatus of the class described comprising alow, pressure, grease dispensing unit, a high pressure grease dispensingunit, discharge pipes communicating with each of said units, commonpressure generating meansfor said units,

a feed pipe connecting said units, a return pipe communicating with eachof the units,

'a' cut oli valve for said low pressurefeed unit arranged when in Openposition to permitthe I discharge of grease through its communicatingdischarge pipe and arrangedjwhen' inclosed position to diverge greasefed thereto into said return pipe and manually adjustable pressurecontrol means between each of said units and said return pipe.

2. A grease dispensing apparatus of the class described comprising asupply tank scribed comprisinghighjand low pressure dispensing unitseach having individual dis,- charge pipes connected therewith, commonpressure generating means for said units, discharge control means forsaid units adapted to control communication through the respectivedischarge pipes and a return pipe communicating with each of the unitsoperable to receive the material from the respective units upon apredetermined adjustment of said discharge control means.

In testimony whereof I aflix my ,slgnature. 7

EDWIN ADAMS;

having its bottom portion provided with a I discharge opening, acylinder formed at the bottom of said tank communicating with saidopening and having a piston operatively arranged thereln, drive meansfor said piston, said cylinder having its inner endterminating in alongitudinally extending bore, a plunger carried on the inner end ofthepiston and mounted for slidingmovement in said bore, a feed pipecommunicating with the inner end 'of' the cylinder, a low pressuresupply chamber connected with said feed pipe, said chamber having adischarge pipe communicating therewith, a cut oif valve interposedbetween said chamber and the discharge pipe, a feed pipe connecting saidbore with said first named feed pipe, check valves interposed. in eachof said pipes, the valve in said first named pipe being arranged foropening movement upon the compression stroke of the piston and the valvein said last named pipe being arranged for closing move ment upon thecompression stroke of said u plunger, a discharge pipe communicatingwith the outer end of the bore, a return pipe connecting said last nameddischarge pi e a and said low pressure feed chamber with tlie supplytank and pressure control valves adtween said discharge pipe and saidlow pressure supply chamber.

3., In a grease dispensing apparatus of the type specified in claim 2wherein a grease ]ustably arranged in said return pipe befollower isoperatively' associated with the piston whereby to prevent the formationof

